7(2x-1)+3(4x-7)-5(3x+2)+4=0
问题描述:
7(2x-1)+3(4x-7)-5(3x+2)+4=0
答
14x-7+12x-21-15x-10+4=0
14x+12x-15x=21+7+10-4
11x=34
x=34/11